Summary: AU. Hayley is Castiel's best friend, and she can't help but love him. At seventeen, her older brother Dean thinks she's too young to love, but when she and Castiel get together, she proves that you're never too young to love. Please R&R!

Disclaimer: I don't own Supernatural or its characters. I only own Hayley Winchester.

A/N: Okay, another sister!fic, but here we go and it's a Cas/Winchester!SisterOC, and she's gonna be awesome. I've got a feeling that I'm going to love writing this so I hope you enjoy reading it! Please don't be shy and leave a review!

Ages of Characters: Hayley - 17, Castiel - 17, Dean - 18, Jimmy - 17, Amelia - 17 Anna - 18, Gabriel - 18, Jo - 17, Sam - 14, Jess - 14, Michael - 21, Lucifer - 20, Zachariah - 19, Chuck - 17, Becky - 17, Lilith - 18, Ruby - 17, Meg - 17, Alastair - 18, Azazel - 17.

Yes, a lot of characters and certainly lots of pairings, but I hope you like it!

Never Too Young

Chapter One: He Was A Boy, She Was a Girl...

Hayley Winchester looked over at her friend, Castiel Novak, sighing and tying up her light brown curls. The library was dotted with a few rays of sunlight, dust mites visible in the air as they floated slowly and gently through the sunbeams, Castiel looking over at his friend and smiling sweetly at her. He loved to look at her, her stunning green eyes captivating and lips luscious and full.

"What are you thinking of?" He asked with a chuckle, taking the fact she was tying her hair up as a sign of her brain kicking into gear while not missing sadness washing over Hayley's eyes.

"Kicking Meg's ass after school tomorrow." She huffed, folding her arms as she sat back in her chair, pen and books discarded to her side as she'd lost the will to work a long time ago, "Think I can take her?"

"Don't get suckered into it." Castiel said softly, "Ignore her and carry on as normal. She'll get bored and leave you alone."

"Bitch." Hayley hissed, perfect nostrils flaring as she sighed, "Stupid fucking insensitive bitch."

"Shhh," Castiel soothed, "It's okay, don't worry about her."

He hated seeing Hayley get so upset so he put his pen down and moved across the small sofa area in the library and sitting by her side, looking into her eyes with nothing but care and devotion as a friend should, opening his arms to her. Hayley chuckled, pulling on the sleeves of her dusky pink long-sleeved t-shirt, the torso of which was covered by the black dress she wore over it and she moved into his embrace, smiling and holding him tight.

"You always know how to make me feel better, Cas." She said sweetly, releasing her friend and gently stroking his face with her fingers, the softness of his skin comforting to her, "Thanks."

"Anytime." Castiel replied, patting her shoulder before grabbing his bag and putting his books away, "Come on, Jimmy should be here soon."

Hayley was going to Castiel's house tonight, but they had to wait for Jimmy outside school because he was working in one of his gifted and talented classes which were held after school. Dean was with Anna at the movies, Gabriel was over at the Roadhouse with his new girlfriend, Jo, who was a year younger than him which concerned her mother Ellen greatly, and as for the other members of Castiel and Hayley's families, they were at work. The pair of them headed out of school, linking arms while Hayley leaned on her friend, sighing and smiling as they walked across the yard to the gates. The autumn sun was shining softly on them as they made their way past the piled up leaves and waited for Jimmy who always pulled the car out of the gates before picking up Castiel.

Usually Gabriel drove them to school and back, but sometimes the twins were left to get themselves home since Gabriel was off to some other girl's house to either screw her (which he'd done nothing but since he'd turned eighteen) or flirt with her until she slapped his face and kicked him out. He wasn't getting into Jo Harvelle's pants anytime soon though, because that girl had values and she wanted to know he had good intentions and truly loved her before they did anything too serious.

As for Castiel and Hayley...well...they really liked each other. Even a blind, deaf mute could tell that they just wanted to be together. It seemed everyone could tell except themselves, which just annoyed everyone. Hayley slung her bag over her shoulder and pressed against the wall, sighing and taking her hair out of the hair band again and ruffling it up, Castiel trying not to stare. She'd told him more than once for that. She seemed to be the only person, however, who got Castiel, who understood him and his strange ways and behaviour. He wasn't completely strange to the point where people would cross the street to avoid him, but his strangeness seemed to make him somewhat cooler to people, and Hayley couldn't help but love that about him.

Hayley was cool in her own way. She could recite parts of movies off by heart and she could remember passwords and codes as easily as she could write her own name, and she played more musical instruments than Castiel could count on his fingers. She was going to get an A+ in music and it would probably be her career because she was so good at it, and Castiel had so much faith that she'd be famous one day, famous and a damn good role model to others who wanted to be like her. As for him, he didn't think himself as anything particularly special, but to Hayley he was more special than anyone she'd ever met. Although...she'd never tell him that. He'd probably run screaming in the other direction as most boys did who she found she had feelings for.

"Where is he?" Castiel asked, checking his cell phone for the time, "It's gone four."

"Cas," Hayley began, her friend looking up at her with his usual big, bright blue eyes, "Just chill. He'll be here, okay? I just hope I see that Hellbitch Ruby so I can kick her fucking teeth..."

She trailed off when she spotted the bitch herself sauntering along on the other side of the road and she saw red. Castiel knew immediately what was going to happen and he grabbed Hayley's arms.

"Leave her." He said, the younger teen struggling with unbelievable strength against his hold, "Hayley, calm down!"

Just as luck would have it, Ruby just went by and Hayley relaxed, running a hand through her hair and taking a deep breath. Jimmy pulled up outside the gates and beeped the car horn, making both Hayley and Castiel jump.

"Come on, you two!" He laughed, "I've been sat here for five minutes!"

"More like ten seconds, you liar!" Castiel replied, Hayley grinning at the cuteness of their banter.

"Hi, Jimmy." She said sweetly, Jimmy smiling and winking at her.

"Hey, Sex-on-Legs," He replied, "How's it going?"

"Jimmy, don't be such a perv." She chuckled, "And it's going good, thanks."

She climbed into the car, missing the glare that Castiel gave to Jimmy. His brother raised his hands in defence and Castiel climbed into the car beside his twin, Jimmy pulling out of the school gates and towards the Novak house.

Castiel was looking forward to spending the early evening with Hayley, even if they were working on a drama project. God, how Castiel loathed drama...

-TBC-

Hope you enjoyed this first chapter, and it's so good to be back writing again! *Sighs and hugs my SPN gang and then hugs you all* I've missed it!

Thanks for reading so far and for the constant support while I've been away. It means a lot!

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